noun, masculine

aérostathonion

/a.e.ʁɔs.ta.tɔ.njɔ̃/

noun, masculine/a.e.ʁɔs.ta.tɔ.njɔ̃/plural: aérostathonions

aérostathonion is masculine in French.

an early weather station (combined thermometer and barometer)